Research by Eves et al. (2021) examines the long-term cognitive outcomes of individuals born very preterm (VPT) or with very low birth weight (VLBW) compared to those born at term. The study uses a comprehensive meta-analysis of individual participant data (IPD) from multiple cohorts to identify factors contributing to differences in adult IQ.
Background
Individuals born VPT or with VLBW face higher risks of developmental challenges throughout life. Understanding how these early-life conditions affect adult cognitive outcomes can guide interventions aimed at mitigating long-term impacts. This research synthesizes data from studies conducted between 1978 and 1995, including over 2000 participants, to explore these relationships in depth.
Key Insights
Risk Factors: Lower gestational age, reduced birth weight z-scores, neonatal bronchopulmonary dysplasia, intraventricular hemorrhage, and lower maternal education levels were strongly linked to reduced IQ in adulthood.
- Differences in IQ: Adults born VPT or with VLBW scored on average 12 IQ points lower than those born at term, equating to a difference of 0.78 standard deviations.
- Risk Factors: Lower gestational age, reduced birth weight z-scores, neonatal bronchopulmonary dysplasia, intraventricular hemorrhage, and lower maternal education levels were strongly linked to reduced IQ in adulthood.
- Protective Interventions: Addressing neonatal complications and improving access to maternal education are identified as strategies to enhance cognitive outcomes for individuals born VPT or with VLBW.
Significance
This research highlights the persistent impact of early-life health and social factors on adult cognitive abilities. By identifying modifiable risks, such as neonatal care and maternal education, the study provides actionable insights for improving long-term outcomes for at-risk populations. These findings underscore the value of coordinated efforts across healthcare and education systems.
Future Directions
Further research could expand on this work by exploring the role of additional environmental and genetic factors in shaping cognitive outcomes. Longitudinal studies involving more diverse populations may also provide insights into broader applicability and guide policies aimed at reducing disparities in cognitive development.
Conclusion
The findings of Eves et al. (2021) emphasize the importance of addressing both biological and social determinants in supporting individuals born VPT or with VLBW. Through targeted interventions, it is possible to improve the long-term cognitive potential of these populations, contributing to more equitable outcomes in adulthood.
Reference
Eves, R., Mendonça, M., Baumann, N., Ni, Y., Darlow, B. A., Horwood, J., Woodward, L. J., Doyle, L. W., Cheong, J., Anderson, P. J., Bartmann, P., Marlow, N., Johnson, S., Kajantie, E., Hovi, P., Nosarti, C., Indredavik, M. S., Evensen, K.-A. I., Räikkönen, K., Heinonen, K., Zeitlin, J., & Wolke, D. (2021). Association of very preterm birth or very low birth weight with intelligence in adulthood: An individual participant data meta-analysis. JAMA Pediatrics, 175(8), e211058. https://doi.org/10.1001/jamapediatrics.2021.1058
Related Research
Does Music Training Increase IQ? What the Research Actually Shows
Few claims in popular science are as persistent as the idea that music makes you smarter. From the "Mozart Effect" craze of the 1990s —…
Apr 15, 2026Working Memory: Why It Matters More Than You Think
Every time you hold a phone number in mind while searching for a pen, follow a multi-step recipe, or mentally compare two arguments in a…
Apr 13, 2026The G Factor: What General Intelligence Really Means
In 1904, Charles Spearman noticed something that would reshape the study of intelligence for the next century: children who scored well on one type of…
Apr 10, 2026Sleep Deprivation and Cognitive Performance: What One Bad Night Does to Your Brain
In 1999, researchers at the University of New South Wales made a startling discovery: people who had been awake for 17–19 hours performed on cognitive…
Apr 8, 2026Mindfulness and Cognitive Performance: Does Meditation Actually Make You Smarter?
Meditation has entered the mainstream. From corporate boardrooms to elementary schools, from military training to clinical therapy, mindfulness practices are promoted as cognitive enhancers that…
Apr 6, 2026People Also Ask
What are the link between physical activity and cognitive health?
Recent research highlights how everyday physical activity can benefit cognitive health. A study by Hakun et al. (2024) examined the short-term effects of regular physical activity on mental processing speed and working memory. Using real-time assessments, the study provides new insights into how light and moderate physical activities can promote brain health in middle-aged adults.
Read more →What are gender differences in early education impacts on cognitive outcomes?
This study, published by Burchinal et al. (2024), examines the long-term effects of early childhood education (ECE) interventions on cognitive outcomes, with a focus on how impacts vary by gender. Using data from the Carolina Abecedarian Project, the researchers explore treatment effects from infancy through middle adulthood, highlighting key differences in outcomes between males and females.
Read more →What are sensorimotor variability and early cognition?
A recent study by Denisova and Wolpert (2024) investigates how early sensorimotor features relate to cognitive differences in toddlers diagnosed with autism spectrum disorder (ASD). By examining over 1,000 children with varying IQ levels, the researchers reveal how sensorimotor variability impacts behaviors linked to autism, providing valuable insights for individualized interventions.
Read more →What are distinct genetic and environmental origins of hierarchical cognitive abilities in adult humans?
Understanding how genetic and environmental influences shape cognitive abilities remains a cornerstone of psychological research. Jiang et al. (2024) present an important study that examines these influences through a structured twin-based model. This research provides insight into how basic and higher-order cognitive functions are differentially affected by genetic inheritance and shared experiences.
Read more →Why is background important?
Individuals born VPT or with VLBW face higher risks of developmental challenges throughout life. Understanding how these early-life conditions affect adult cognitive outcomes can guide interventions aimed at mitigating long-term impacts. This research synthesizes data from studies conducted between 1978 and 1995, including over 2000 participants, to explore these relationships in depth.
How does key insights work in practice?
Differences in IQ: Adults born VPT or with VLBW scored on average 12 IQ points lower than those born at term, equating to a difference of 0.78 standard deviations. Risk Factors: Lower gestational age, reduced birth weight z-scores, neonatal bronchopulmonary dysplasia, intraventricular hemorrhage, and lower maternal education levels were strongly linked
Sharma, P. (2021, June 2). Impact of Very Preterm Birth and Low Birth Weight on Adult IQ. PsychoLogic. https://www.psychologic.online/2021/06/02/preterm-birth-adult-intelligence-outcomes/
